<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="java.util.*,java.io.*"%>
<%@ page import="java.text.SimpleDateFormat"%>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page import="org.apache.commons.fileupload.disk.*"%>
<%@ page import="org.apache.commons.fileupload.servlet.*"%>
<%@ page import="org.json.simple.*"%>
<%@ page import="org.springframework.web.multipart.MultipartFile"%>
<%@ page import="org.springframework.web.multipart.MultipartHttpServletRequest"%>
<%@ page import="org.springframework.web.multipart.commons.CommonsMultipartResolver"%>
<%@ page import="org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper"%>
<%
	//文件保存目录路径     //D:\Tomcat6.0\webapps\zswz\attached/ 
	String savePath = request.getSession().getServletContext().getRealPath("/")+ "upload/news/";
	//文件保存目录URL /zswz/attached/ 
	String saveUrl = request.getContextPath() + "/upload/news/";
	//定义允许上传的文件扩展名 
	//定义允许上传的文件扩展名 
	HashMap<String, String> extMap = new HashMap<String, String>();
	extMap.put("image", "gif,jpg,jpeg,png,bmp");
	extMap.put("flash", "swf,flv");
	extMap.put("media","swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
	extMap.put("file","doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");
	//允许最大上传文件大小 struts.xml struts.multipart.maxSize=3G 
	long maxSize = 3000000000l;
	response.setContentType("text/html; charset=UTF-8");
	if (!ServletFileUpload.isMultipartContent(request)) {
		out.println(getError("请选择文件。"));
		return;
	}
	//检查目录 
	File uploadDir = new File(savePath);
	if (!uploadDir.isDirectory()) {
		out.println(getError("上传目录不存在。"));
		return;
	}
	//检查目录写权限 
	if (!uploadDir.canWrite()) {
		out.println(getError("上传目录没有写权限。"));
		return;
	}
	String dirName = request.getParameter("dir");
	//image 
	if (dirName == null) {
		dirName = "image";
	}
	if (!extMap.containsKey(dirName)) {
		out.println(getError("目录名不正确。"));
		return;
	}
	//创建文件夹 
	savePath += dirName + "/";
	//D:\Tomcat6.0\webapps\zswz\attached/image/ 
	saveUrl += dirName + "/";///zswz/attached/image/ 
	File saveDirFile = new File(savePath);
	if (!saveDirFile.exists()) {
		saveDirFile.mkdirs();
	}
	SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
	String ymd = sdf.format(new Date());
	savePath += ymd + "/";
	//D:\Tomcat6.0\webapps\zswz\attached/image/20111129/ 
	saveUrl += ymd + "/";///zswz/attached/image/20111129/ 
	File dirFile = new File(savePath);
	if (!dirFile.exists()) {
		dirFile.mkdirs();
	}
	if (!dirFile.isDirectory()) {
		out.println(getError("上传目录不存在 。"));
		return;
	}
	//检查目录写入权限 
	if (!dirFile.canWrite()) {
		out.println(getError("上传目录没有写入权限。"));
		return;
	}
	
	CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());     
     commonsMultipartResolver.setDefaultEncoding("utf-8"); 
     
     MultipartHttpServletRequest mul =  commonsMultipartResolver.resolveMultipart(request);     
     List<MultipartFile> files = mul.getFiles("imgFile"); 
    
    // 获得文件：    
    MultipartFile file = files.get(0);    
    // 获得文件名：    
    String fileName = file.getOriginalFilename();    
    // 获得输入流：    
    InputStream in = file.getInputStream(); 
    
    // 写入文件    
    
    

    
	//Struts2 请求 包装过滤器 
	//MultiPartRequestWrapper wrapper = (MultiPartRequestWrapper) request;
	//获得上传的文件名 
	//String fileName = wrapper.getFileNames("imgFile")[0];
	//imgFile,imgFile,imgFile 
	//获得文件过滤器 
	//File file = wrapper.getFiles("imgFile")[0];
	//检查扩展名 
	String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1)
			.toLowerCase();
	if (!Arrays.<String> asList(extMap.get(dirName).split(","))
			.contains(fileExt)) {
		out.println(getError("上传文件扩展名是不允许的扩展名。\n只允许"
				+ extMap.get(dirName) + "格式。"));
		return;
	} //检查文件大小 
	if (file.getSize() > maxSize) {
		out.println(getError("上传文件大小超过限制。"));
		return;
	}
	//重构上传图片的名称 
	SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
	String newImgName = df.format(new Date()) + "_"
			+ new Random().nextInt(1000) + "." + fileExt;
	byte[] buffer = new byte[1024]; //获取文件输出流 
	FileOutputStream fos = new FileOutputStream(savePath + "/"
			+ newImgName);
	//获取内存中当前文件输入流 
	//InputStream in = new FileInputStream(file);
	try {
		int num = 0;
		while ((num = in.read(buffer)) > 0) {
			fos.write(buffer, 0, num);
		}
	} catch (Exception e) {
		e.printStackTrace(System.err);
	} finally {
		in.close();
		fos.close();
	}
	//发送给 KE  
	JSONObject obj = new JSONObject();
	obj.put("error", 0);
	obj.put("url", saveUrl + "/" + newImgName);
	///zswz/attached/image/20111129/  image 20111129195421_593.jpg 
	out.println(obj.toJSONString());
%>
<%!private String getError(String message) {
		JSONObject obj = new JSONObject();
		obj.put("error", 1);
		obj.put("message", message);
		return obj.toJSONString();
	}%>